fix(ci): downgrade async-executor to 1.5.2 (#7911)

.github/workflows/test-core.yml

@@ -106,6 +106,7 @@ jobs:
           cargo update -p reqwest --precise 0.11.18
           cargo update -p cfg-expr:0.15.5 --precise 0.15.4
           cargo update -p memchr --precise 2.6.2
+          cargo update -p async-executor --precise 1.5.1
 
       - name: test
         run: cargo test --target ${{ matrix.platform.target }} ${{ matrix.features.args }}